{"product_id":"precision-twist-drill-5998356-jobber-drill-bit-letter-e","title":"Precision Twist Drill 5998356 Jobber Drill Bit Letter E","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRECISION TWIST DRILL 5998356 is a jobber-length drill bit sized at Letter E, equivalent to 0.250 inches (1\/4 inches), made from high speed steel (HSS) with a bright, uncoated finish. It features a standard 118-degree split point and a two-flute regular spiral configuration with web thinning for reduced thrust during entry. The overall length is 4 inches with a 2.75-inch flute length, making it a general-purpose choice for production and maintenance drilling operations. Machinists, tool-and-die technicians, and general metalworking tradespeople are the primary users of this bit.\u003c\/p\u003e\u003cp\u003eThis drill bit is suited for right-hand drilling in steel, cast iron, non-ferrous metals, superalloys, and titanium. Its straight cylindrical shank measures 0.250 inches in diameter and 1.25 inches in length, compatible with standard drill chucks across benchtop drill presses, CNC machines, and handheld power tools. The tapered web configuration and web-thinned geometry support clean chip evacuation in deep-hole applications up to the maximum drilling depth of 2.75 inches. It is cataloged under Series R10H-R18H and meets ANSI standards.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLetter E size (0.2500 inches decimal) with straight cylindrical shank at 0.2500 inches diameter\u003c\/li\u003e\n\u003cli\u003e118-degree standard point angle for general-purpose entry on steel and cast iron\u003c\/li\u003e\n\u003cli\u003eTwo-flute regular spiral design with web-thinned, tapered web for lower cutting thrust\u003c\/li\u003e\n\u003cli\u003eBright uncoated HSS construction suitable for a wide range of workpiece materials\u003c\/li\u003e\n\u003cli\u003e4-inch overall length with 2.75-inch flute and 2.75-inch maximum drilling depth\u003c\/li\u003e\n\u003cli\u003eConforms to ANSI specifications, Series R10H-R18H\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose jobber-length drill bit for use in steel, cast iron, non-ferrous metals, superalloys, and titanium workpieces. Fits any standard drill chuck accepting a 0.250-inch straight cylindrical shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eSecure the straight cylindrical shank firmly in a properly sized drill chuck before operation. Ensure the workpiece is clamped or fixtured to prevent movement during drilling. Apply appropriate cutting fluid when drilling steel, cast iron, or titanium to extend tool life and improve hole quality. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Letter)\u003c\/strong\u003e: E\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Size (Inch)\u003c\/strong\u003e: 1\/4 inches (0.2500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: High Speed Steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrill Point Angle\u003c\/strong\u003e: 118 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral, Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 2.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Drilling Depth\u003c\/strong\u003e: 2.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeb Configuration\u003c\/strong\u003e: Tapered, Web-Thinned\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: R10H-R18H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Materials\u003c\/strong\u003e: Steel, Cast Iron, Non-Ferrous Metal, Superalloys and Titanium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.04 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PRECISION TWIST DRILL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5998356\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRECISION TWIST DRILL","offers":[{"title":"Default Title","offer_id":51690510090546,"sku":"5998356","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac335c1d53632e99459aa82e5500dfd1.jpg?v=1788270779","url":"https:\/\/voomisupply.com\/products\/precision-twist-drill-5998356-jobber-drill-bit-letter-e","provider":"Voomi Supply","version":"1.0","type":"link"}